Can we expect a large bump in the Indian GDP, if black money's major?
Not much unfortunately. GDP increases when people spend more, businesses are investing more and overall production goes up. I don't see that with the current scenario. RBI has recently announced a 25 basis point cut in Repo rate which would have a bigger impact than this. The currency demonetizing will ensure people who had unaccountable money will be tracked. GDP is a different ballgame altogether